| * Copyright (C) 2009 Denys Vlasenko |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
| typedef struct random_t { |
| /* State of random number generators: */ |
| /* Galois LFSR (fast but weak) */ |
| int32_t galois_LFSR; /* must be signed! */ |
| /* LCG (fast but weak) */ |
| /* 64-bit xorshift (fast, moderate strength) */ |
| #define UNINITED_RANDOM_T(rnd) \ |
| ((rnd)->galois_LFSR == 0) |
| #define INIT_RANDOM_T(rnd, nonzero, v) \ |
| ((rnd)->galois_LFSR = (rnd)->xs64_x = (nonzero), (rnd)->LCG = (rnd)->xs64_y = (v)) |
| #define CLEAR_RANDOM_T(rnd) \ |
| uint32_t next_random(random_t *rnd) FAST_FUNC; |
| POP_SAVED_FUNCTION_VISIBILITY |